ADU Contractors near Westminster, CA
MTZ Contractors
3515 Atlantic Avenue, Long Beach, CA 90807
11.8 miles
Looking for the best ADU construction? Choose Mtz Contractors Inc to completely transform your property, known for constructing excellent ADUs in Long Beach CA. We create and build Accessory Dwelling Units that meet your precise requirements for q... read more
Pros ADU Builders
27201 Puerta Real, Lake Forest, CA 92691
22.5 miles
Pros ADU Builders in El Cerrito specializes in ADU construction, including detached units, garage conversions, in-law suites, and granny flats. They handle permits, planning, and turnkey builds tailored to each property.
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Ayala Builder Company
#11824, Granada Hills, CA 91344
46.5 miles
Ayala Builder Company in Granada Hills specializes in custom ADU construction, including detached ADUs, granny flats, garage conversions, and in-law suites. They handle design, permitting, construction, and final inspection for code-compliant resu... read more
R Remodeling
6745 Washington Avenue, Whittier, CA 90601
13.2 miles
R Remodeling is a trusted ADU contractor in Whittier, specializing in accessory dwelling units for added living space or rental income. Experienced in detached ADUs, they manage projects from consultation to completion with minimal property disrup... read more
CentrePoint Construction Inc.
21133 Victory Boulevard, Canoga Park, CA 91303
47.2 miles
CentrePoint Construction Inc. offers turnkey ADU construction and garage conversions in Los Angeles. Services include detached ADUs, JADUs, design, permits, and city approvals—ideal for rental income or family housing.
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The ADU Company
504 East Navilla Place, Covina, CA 91723
23.7 miles
The ADU Company, a licensed ADU contractor in Covina, CA, serves greater Los Angeles with expert accessory dwelling unit design and construction, including garage conversions, detached ADUs, JADUs, home additions, remodels, and more.
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Create Construction
3500 West Olive Avenue, Burbank, CA 91505
34 miles
Create Construction is a licensed, family-owned ADU contractor serving Los Angeles, Orange, and Ventura Counties. They specialize in garage conversions, granny flats, and attached ADUs, managing design, permits, and construction from start to fini... read more
Rost Architects
8855 Research Drive, Irvine, CA 92618
16.5 miles
Plan your ADU project with expert guidance. Rost Architects covers key factors like setbacks, height limits, floor area, utilities, and local guidelines to help homeowners avoid costly mistakes and build compliant, well-designed accessory dwelling... read more
Pixel Arch LLC
24001 Calle De La Magdalena, Laguna Hills, CA 92653
19.1 miles
Pixel Arch LLC, Glendale CA, offers residential architecture services including custom home design, ADUs, garage conversions, duplexes & remodeling. Permit-ready plans, Title 24 reports & 3D renderings for California clients.
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Construction Masters
18075 Ventura Boulevard, Los Angeles, CA 91316
41.9 miles
Construction Masters™ is a trusted ADU contractor offering full-service design, engineering, and construction of accessory dwelling units. They build granny flats, in-law suites, and detached ADUs, boosting property value with a free consultatio... read more
L Square Construction
Irvine, CA 92705
10.4 miles
L Square Construction is an ADU contractor serving Los Angeles & Orange County, CA. They offer full-service design-build ADU solutions including detached units, in-law suites, garage conversions, and energy-efficient builds with solar integrat... read more
SE Builders Inc
13006 Philadelphia Street, Whittier, CA 90601
15.7 miles
SE Builders Inc completed an ADU project in Fullerton, CA, transforming a structure into a modern living space. Features include updated framing, durable finishes, eco-friendly materials, energy-efficient systems, and low-maintenance landscaping.<... read more
Kol & Co
23431 Blue Bird Dr, Lake Forest, CA 92630
18.5 miles
Kol & Co. is an ADU contractor serving Orange County, West LA & North San Diego. With 15+ years in design-build, they handle detached ADUs, garage conversions, JADUs & more—managing permits, design, and construction under one roof.read more
Next Level ADU Builders
8520 Florence Avenue, Downey, CA 90240
15.1 miles
Next Level ADU Builders, serving Los Angeles, Riverside & Pico Rivera since 1997, specializes in ADU construction—detached units, granny flats & casitas—plus HVAC, remodeling & roofing, with financing options available.
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The ADU Builder Inc
3639 Atlantic Avenue, Long Beach, CA 90807
11.8 miles
Los Angeles ADU contractor The ADU Builder offers 10+ years of experience in ADU construction, garage conversions, JADUs, custom homes & remodels. They guide clients through design, permits, financing & building with quality craftsmanship.... read more
Other cities in California
What you need to know
ADU Contractors in Westminster, CA: Building in Orange County's Little Saigon
Westminster, California, famously known as the home of Little Saigon, the largest Vietnamese-American community in the United States, is a vibrant city in Orange County with a dense residential landscape. This unique cultural and demographic character has driven significant demand for Accessory Dwelling Units (ADUs) in Westminster, as multigenerational living is a deeply rooted tradition in many of the city's households. Experienced ADU contractors in Westminster understand this cultural context and specialize in designing spaces that accommodate extended families while maximizing property value.
Westminster ADU Regulations and Zoning Requirements
ADU contractors working in Westminster must navigate both California state ADU laws and the city's local ordinances. Following California's landmark ADU legislation, Westminster has aligned its policies to encourage ADU development. Key regulations that contractors and homeowners must be aware of include:
- ADUs are permitted in single-family and multifamily residential zones throughout Westminster
- Detached ADUs can be up to 1,200 square feet in size
- Junior ADUs (JADUs) are allowed up to 500 square feet within the existing primary structure
- Setback requirements typically require 4-foot side and rear yard setbacks for new detached ADUs
- ADUs under 750 square feet are exempt from impact fees under California law
- Owner-occupancy requirements have been suspended through 2025 per state law
Why Hire a Local Westminster ADU Contractor?
Hiring a licensed ADU contractor familiar with Westminster is essential for a smooth building process. Local contractors have established relationships with the City of Westminster Community Development Department and understand the permitting timelines and plan check requirements specific to this city. Westminster's older housing stock, with many homes built in the 1950s through 1970s, often presents unique challenges such as outdated electrical panels, older plumbing systems, and slab foundations that require expert evaluation before ADU construction begins.
Types of ADUs Built in Westminster
Professional ADU contractors in Westminster offer a full range of construction options tailored to the city's typical lot sizes and home configurations:
- Detached ADUs – Standalone backyard units ideal for rental income or family use
- Attached ADUs – Additions connected to the primary residence
- Garage Conversions – A popular and cost-effective option given Westminster's many single-car garages
- Junior ADUs (JADUs) – Interior conversions within the existing home footprint
Maximize Your Westminster Property with a Trusted ADU Contractor
With median home values rising across Orange County, adding an ADU in Westminster is one of the smartest investments a homeowner can make. Whether you're looking to house family members, generate rental income, or increase your property's resale value, working with a qualified, licensed ADU contractor in Westminster, CA ensures your project is completed on time, on budget, and fully up to code.